Johx doyle



(No Model.)

J. DOYLE. I LOCKING DEVICE FOR GAS COCKS.

No, 576,956. I Patented Feb. 9, 1897.

letters in all the figures.

that it cannot be broken, tampered with, or

" the line 2 2, Fig. 1.

' UNI-TED ,STATES PATENT OFFICE.

JOHN DOYLE, OF NElV YORK, N. Y.

LOCKING DEVICE FOR GAS-COCKS.

SPECIFICATION forming part of Letters Patent No. 576,958, dated February9, 1897.

' Application filed Apri 3, 1896. $eria-l No. 588,148. (No model.)

To all whom it nuty concern.-

Be it known that I, J OHN DOYLE, a citizen of the United States,residing in the city, county, and State of New York, have invented a newand useful Improvement in Looking Devices for Gas-Cocks, of which thefollowing is a specification.

My invention relates generically to devices for locking cocks and valvesand also for limiting their operation; and it relates specifically togas-supply cocks and to means for locking them when shut off and forlimiting the extent of their opening.

, Among the particular objects of my invention are to provide gas-supplycocks with a locking device which is entirely inclosed, so

unlocked excepting by the proper key, and which is of simple and strongconstruction, and also with simple and effective means for adjusting andlimiting the extent of opening a of the cock, so that no more than apredetermined supply of pressure or gas can pass through the cock.

In order that my invention may be clearly ascertained, I shall firstdescribe in detail the mode in which I carry the invention intopractice, and then particularly point out the invention in the claims.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which like parts are designated by the sameFigure 1 is a sectional view of a gas-cock embodying my invention on thelinel 1, Fig. 2. Fig.- 2 is a sectional view of the same on Fig. 3 is alongitudinal sectional view of the cock-casing.

A designates the casing of a gas-cock; B, the core; 0, the core-washer,and D the coreretaining nut, the core B being shown in Fig. 1 closed tocompletely shut off the cock.

I prefer to construct the-core Bin two sections, the section Bconstituting the body of the core and having the transverse gas-passageO to register, when opened, with the gaspassages in the casing, and thesection B united to the section B and formed with the usual flat stem Efor turning the cock.

The top of the core-section B is by preference closed by a solid head Dto prevent the gas from passing into the outer part of the core, and thecore-section B is chambered at G to fit flush over the headD of sectionB and is fastened thereto by screws F within the casing A, so as to formthe complete core.

In the chamber G of the core-section B and on the head D of thecore-section B, I prefer to mount a sliding bolt H, having in thisinstance two ordinary locking-tumblers I, which bolt is adapted to workthrough a lateral slot J in core-section B and, when the cock is shutofi, into a corresponding bolt-hole K, which I form in the interior ofthe casing A, so that the cock-core will then be securely 6 5 lockedagainst turning and the cock against opening. At the same time it willbe impossible, owing to said locked bolt, to withdraw the core from thecasing and thus reach either the bolt or the incasecl screws F, whichsecure the core-section B to the core-section B, so that no one, unlessarmed with the proper key, gan open or disarrange the cock so as toallow the gas to pass therethrough.

I provide for locking and unlocking the cock-bolt H by means of anappropriate key L, inserted in a key-slot M, which I form axialiythrough the core-stem E, so as to lead to the lock-chamber G and to thebolt H and tumblers I.

For adjusting and limiting the opening of the cock and thus the possiblesupply of gas therethrough I form a series of (in this case) threeconcentric slots 0 of varying lengths in the interior of the casing A,and in the core- 85 section B a corresponding series of sockets orholders P, in one of which holders a peg or stop Q is screwed when thecore is withdrawn from the casing, so as to (when the core is in place)ride in one of the concentric slots 0, 0 and thus limit the rotation ofthe core and opening of the cock, according to the length of theparticular slot 0 selected, without in any way interfering with thecomplete closing of the cook. The cock can thus be set 5 to admit only apredetermined supply or pressure of gas or can be closed and locked, soas to absolutely prevent any gas from being admitted therethrough.

I claim as my invention- 1. The cock herein described as having itscasing formed with a bolt-hole on its inside, and its core constructedof two sections, inclosing therebetween a locking bolt, and

united by fastenings as screws, Whose heads are covered and sealed bythe casing, and locked by the bolt inside the casing.

2. The combination with the casing of a cock having a bolt-hole onitsinside, of a cock core constructed of. two sections inclosingtherebetween a chamber, fastenings uniting said sections and sealed bythe casing and a locking-bolt Workingin said chamber through the wall ofthe outer section of the core into said bolt-hole, said outer section ofthe core being provided with a key-slot to admit a boltlocking key.

8. The combination, With the casing of a cockhaving a series ofconcentric slots of varying lengths, of a cock-core having an adjustablestop to ride in either of said slots, and variably limit the opening ofthe cock.

4. The combination, with the casing of a cock having a bolt-hole and aseries of slots of different lengths, of a cock-core having anadjustable stop to ride in either of said slots, a bolt in the core, andmeans for operating the bolt by a key.

5. The combination, with the casing of a cock having a bolt-hole and aseries of slots of different lengths, of a cock-core having anadjustable stop Within the casing to ride in either of said slots,a-bolt in the core and means for operating the bolt by a key.

6. The combination, with the casing of a cock having a series of slotsof different lengths, of a cock-core havinga series of stopholderscorresponding to the respective slots, and a stop to be held in one ofsaid stopholders.

In testimony whereof I have hereunto set my hand this 30th day of March,1896.

JOHN DOYLE.

In presence of- WILLIAM R. BAIRD, CLARENCE L. BURGER.

